激光点云实现探地雷达图像地形校正的研究

发布时间：2018-02-03 14:20

本文关键词： 激光点云探地雷达地形校正时间移位　出处：《激光与红外》2014年08期 　论文类型：期刊论文

【摘要】：探地雷达在地形起伏条件下采集数据时,必须考虑因地形变化产生的图像畸变和精确定位问题。本文采用车载激光扫描系统可快速获取研究区高精度的地形数据,通过探地雷达测量线上均匀分布的离散点,实现测量区地形数据与探地雷达图像之间的同步。根据时间移位原理和线性差值方法,选择某一标准的水平基准面作为参考平面,将探地雷达各道数据的双程传播时间进行校正,从而实现探地雷达图像的地形校正。校正后图像跟校正前相比,不仅显示出复杂地形下介质真实分布形态,而且有助于探地图像的解译和地下目标物及介质层的精确定位。
[Abstract]:When ground penetrating radar collects data under the condition of terrain fluctuation. The problem of image distortion and precise location caused by terrain change must be considered. In this paper, the high precision terrain data of the study area can be obtained quickly by using the vehicle laser scanning system. According to the principle of time shift and the method of linear difference, the synchronization between terrain data and GPR image is realized by using the discrete points of uniform distribution on the ground penetrating radar measurement line. A standard horizontal datum level is selected as the reference plane to correct the bidirectional propagation time of each channel data of GPR, so that the terrain correction of GPR image can be realized. The corrected image is compared with that before correction. It not only shows the real distribution of media in complex terrain, but also helps to interpret the map image and accurately locate the underground objects and media layers.
【作者单位】：首都师范大学资源环境与旅游学院三维信息获取与应用教育部重点实验室;
【基金】：国家科技支撑计划(2012BAH34B01)资助
【分类号】：TN957.52
【正文快照】： 1引言探地雷达作为一种新型的无损探测工具,由于操作简单及较好的分辨率,被广泛应用于近地表下目标物或介质层的探测。探地雷达获取的图像为水平方向和竖直方向成比例的二维灰度图,当地形比较平坦时,探地雷达图像可以将真实的地下构造反映出来。但在实际野外探测中,经常会遇到

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